Disk strain-insulator.



L. STEINBERGER.

DISK STRAIN INSULA'I'OR.

APPLICATION FILED 1mm, 191s.

Patented Nov. 24, 1914.

ws 5 Mr O WITNESSESKI 4 f INVENTOR ATTORNEY *uurrnn 's rnrns m ssus OFFIGE.

LOUIS STEINBERGEB, OF BROOKLYN NEW YORK.

ms}; STRAIN-INSULATOR.

Specification of Letters Patent.

PateutedNovi 24, 1914.

Application filed January 3, 1913. Serial No. 739,990

with annular corrugations'or flanges, such cm-rugations or flan es'serring the double purpose of sl-ied'ding rain Water and increasing; the resistance. to creeps-go .nround the surface of the dish from the strain member at one side of the disk to the strain mernher at the other side thereof by "prm'iding a grcuter surface extent.

The object of thenresent invention is to proridea new and improved form of this type of insulator having' all the advantages of such insulators, but having irregularities of its surface arranged so. as to more etlectually reinforce the structure and so as to proride a continuous path from the central portion of the disk to the periphery, thereof for the free passage of liquid away from the conductors the eentr'zil' portion of the disk. A- f-u'rther object to provide a, structure asebove with ridges-on its opposite-surfaces,=and to shape the ridges on the respective surfaces so as to reinforce each other for more eliectual-ly reinforcing the disk portion of the structure to the end that the dislr portion may be made relfntively thinner than is at present possible for given requirements. A

V A. further objeetis to providea structure as above. which is simple in design; which comprises a *miuimum of fmaterial, and

which is therefore cheap to manufacture, but nevertheless thoroughly substantial and embodies maximum efficiency, both as to its insulating" qualities and .as-to its me ehanical strength, for a. givensized disk.

Other objectsand aims of the invention; more or less specific than those referred to above. will be inpartobvious and iii part pointed out in the course of the following description of the elements; combinations. arrangements of parts- -and applications of principles. constituting the inventionfend on the plane of line 2'2"of Fig.'1';-Fig. 3

the scope of the protection contemplated 55 will be indicated in the appended'claim's.

In. the accompanying drawings which are to be taken as :r-part of th s specification,

and in which I have shown a merely preferred form of embodiment of the i'nVen-tO tion: Figure 1 is a'top-planview of:a n'in-" sulntor constructed in accordance xyiththe principles of this invention; Fig. 2 a transverse sectional View takensubstantially is a view similar to Fig. 2', but illustrating a modification; and Figs; 4 21I1d-5 8.18 diagrnmmutir illustration of other n'iOdifica-. tions.

Beferrinfz to the drawings .for a more detailed. description of the "structure illus trated, the numeral lindicates What; may' be termed the body portion oflthe' insulator, which portion is preferably ofa more-o'rless clone; ted cylindrical shapeadaptedfor-receiring the strainmembers illllstrliilid {n2 end 3. The strain members illustrated; each" comprise a short bolt having ii-n-eye ga i. 4.1M its outer end. and having-its inner :end

Fig. 2% Theinner endsjdofi the'- 'two"sti'a-in membersare spaced apart and rnsmnenn of the body fills the intervening space for effectually insulating the niembers from. each other. though l have shownand 'descr-ibed the strain membersas coinprisin simple bolts having heads spucedapartan inold'ed Within the hod v 1 in-axial alinementi said strain It will be understood, that.

members may of course take any other .fonn so body, preferably at the transverse median line of the body.

Formed upon the upperfsurfaceofithe wall or flange forming the disk portion 6, is a ridge 7. arranged near the body 1 and extends there-- from in a COH'v'OlUtB or spirsldlrection about y from the body 1 between;theieiids'of the 109 This ridge has one endas 8 the body so that its other end as 9 lies ad I ridges various jacentthe periphery of the disk, preferably, though not necessarily, so that a. line extendmg 'to' it radially from the center of the body will intersect the end 8. The ridge 7' may be of a length for providing any number of convolutions aboutthe body intermediate its two ends S and 9. The convolutions are preferably spaced apart by an even space which' servestoform a'groove' will fall from the outer edge of =thediskl" The moisture retaining pockets such as are? formed by the concentric ridges commonly employed are thus entirely avoided. A single convolution of the ridge 7 will provide one ridge at all points radially of the disk to act as a barrier against creepage, etc. Two convolutions of the ridge will supply two distinctridges at all points radially of the disk. The number of convolutions em-' ployed will depend upon'the size of the disk and the requirements which itfis designed to meet and may be altered at will within the scope of this invention.-

It is apparent that the same object would :be ,served if various portions of the convolutions comprised relatively straight legs as shown in the illustrations, Figs. i and 5, rather than the continuous, uniform, curve illustrated in Fig. 1. The presence of Straight legs would have the effect of further increasing the strength of the structure ashas been set forth in my copending application, Serial No. 739,989, the legs servmg as straight stiff bars extending across the surface of the disk and efiectually reinforcing the same. The opposite surface of the disk is provided with a ridge 11 in all respects the counterpart of the ridge 7 described upon the upper surface of the disk.

vThe ridges -7 and 11 upon the respective surfaces of the disk may be arranged directly .beneatheach other, if desired, but they are" preferably arranged so that the ridge upon one surface follows a convolute plane directly opposite to that upon the other surface, that is, supposing the ridge 7 upon the upper surface to be wound, or convoluted, in a clockwise direction away from the central portion of the isk, then the ridge 11 upon the other surface of the disk would be wound, or convoluted. in a contra-clockwise direction from the central portion of the disk. By thus reversing the points intermediate the lengths thereof extend in intersecting planes and in this way lend materially greater strength to the structure.

In disks having their ridges forming poly-sided figures as in Figs. 4 and 5, the figures on the two surfaces would be preferably rotated-relatively to each other, in

rectioris'. In this way relatively straight portions, orlegs, of the figure on one surface would intersect, or be intersected by, relatively angular portions on the other surface. The relative positions 1 of the ridges upon the two surfaces of the disk are clearly illustrated in Fig. 1 wherein the ridges 11 on the under surface of the disk are shown by dotted lines, thereference numeral 12 indicating some of the points of intersection between the two ridges. Similar points are indicated by the reference numeral 13 in Fig.5.

The ridges upon the two surfaces of the disk may project outwardly from the surface of the disk for a uniform distance, that is they may be of the same height throughout their length, and the body 1 may project from the surfaces of the-disk for a like distance, and also the thickness of the disk itself maybe uniform throughout, if desired. It is however, apparent that these various pro ortions may be altered within the scope 0 this invention, for instance as shown inthe modification, Fig. 3 wherein the body 1 projects for a slight distance beyond the plane of the outer edges of the ridges, and wherein the thickness of the disk is greater nearer the body and of puncture nearer the conductors than at pointsfarther spaced therefrom. For the same reason the height of the successive convolutions of the ridges may be reduced addition to being convoluted in opposite dias shown in Fig. 3. The ridge may be of gradually decreasing height throughout its length from the center of the disk to the periphery and the convolutions will consequently progressively decrease 1n height.

By makin at its centra portionand tapering toward its periphery, the path 10 between the convolutions of the ridge is given a continuous downward inclination to ard the periphery of the disk and this inclination of course improves the value of the path as a conductor for moisture.

If desired an annular groove as 14 may be formed upon the periphery of the disk by the addition of obliquely projective flanges 15 which will serve to effectually protect the surfaces of the disk from direct attack of rain water when the disk is disposed with its axis horizontal. ,Such water as strikes the. disk of greater thickness the flanges 11 will he conducted to the lowest int and fall ofi without reaching either sur ace of the disk. The flanges 15 may, of course, be omitted if preferred so as to per unit free discl'nu'ge of the collected moisture,

- from the paths 10, over the edge of the disk.

.As many changes could beniade in this construction without departing from the Scope of the following claims. it is intended that all matter contained in the above deion, or shown in the accompanying drawings shall be interpreted as illustralim only and not in a limiting sense.

Having thus des-r: d my invention. what I claim as new i lid desire to secure by Letters Patent. is

i. In an insulator, a disk. a ridge formed upon each of the opposite surfaces of said disk encircling the central portion of the disk, and each of said ridges extending a convolnlte direction from said central p lion toward the periphery of the d l ridge n one of the surfac .5 exieiniiing in a eonrolute d' .r l to the convolntc direction of lie rn f" the other surface of the disk.

2. in an insulator. a disk formed on each ofits opposite sur ridges each extending in a conroiute direction entirely surrounding the central par-- l on oi the disk, certain parts Gl' s; lfl two ridges extending in dill'erent angular directions. and said mentioned part. of one of said ridges (Werlying said mentioned part of the other ridge, for the purpose set foi'ih.

A disktype insulator comprising a disk of insulating material formed with a. conductor attaching enlargement at its central portion, and a ridge upstanding upon one face of said disk, said ridge entirely encircling said enlargement and extending fromthe central portion oi the disk toward the periphery thereof so as to define a moisture conducting path upon the surface of said disk encircling said enlargement and extending from the central portion of the disk toward the periphery of lhe disk.

4. Aninsulator comprising a disk of insulating material. a ridge formed upon one of the surfaces of said disk, aridge formed upon the opposite surface of said disk, each of said ridges extending from the central portion of the disk toward the periphery thereof and one having a part overlying a part of the other, for the purpose set forth.

5. In an insulator, a disk, a ridge formed upon each of the opposite surfaces of said disk, and each of said ridges extending in a convolute direction from said central por tion toward the periphery of the disk to form a plurality of con volutions about said central portion, each of said ridges cornrising a plurality of substantially straight egs connected end to end in angular relation, and portions of some of the straight legs of the ridge upon one surface of said hout its length so that the convo itions thereof are of successively de creasing 'height.

7. A dislntype insulator comprising a disk of insulating material, and a ridge extending in a curved direction entirely surrounding a portion of the surface of the disk and has 1g its opposite ends spaced apart upon the surface of the disk.

8. A i'iisk-type insulator comprising a disk oi" insulating: material, a ridge formed upon (me sin-lace of said disk, a ridge formed upon Elli} opposite surface of said disk. each oi said ridges extending in urred. direction longitudinally of its length, and one having a part ov rlying a part of the other, for the purpose set forth.

9. A disk-type insulator comprising a. (i' k of insulating material, and ridge formed upon one of the surfaces of said disk, a ridge formed upon the opposite surface of said disk, each of said ridges extending from the central portion of the disk toward the periphery thereof for a plurality of convolutions about said central portion of the disk, and one of said ridges having parts overlying parts of the other ridge at a plurality of spaced points in its length.

10. A disk-type insulator comprising a disk of insulating material, and a ridge upstanding upon one surface of the disk entirely surrounding a portion of said surface and lapping upon itself in spaced relation to provide a plurality of barriers upon said surface radially from said surroundcdportion and at the same time to I)I"O"ld6 a moisture conducting path from said surrounded portion between said barriers.

11. A disk-type insulator, comprising a disk of insulating material, and a ridge upstanding upon one surface of the disk cntirely surrounding a port-ion of said sur face and lapping upon itself in spaced rela tion to provide a plurality of barriers upon said surface radially from said surroui'ided ortion,

12. i\ disk-type insulator, comprising a disk of insulating material. and a ridge upstanding upon one surface of the disk ontirely surrounding a portion of said surface and being arranged to define a moisture congradually decreasing height subducting path upon said surface extending away from said surrounded portion.

13. A disk-type insulator, comprising a disk of insulating material formed with a conductor attaching part thereon, and a ridge upstanding upon one surface of said disk having parts disposed to provide a plurality of spaced barriers upon said surface in a radial direction from said conductor attaching part.

, 14. A disk-type strain insulator, comprising suspension members, a mass of insulating material partially enveloping the same and having a disk portion, said diskportion being provided upon one of its surfaces with a ridge upstanding therefrom surrounding one of said suspension members and extendmg in a convolute dlrectlon toward the pei-iphery of the disk portion.

15. A disk-type strain insulator, comprising suspension members, a mass of insulating material partially enveloping the same and having a disk portion, said disk portion being provided upon one of its surfaces with a ridge upstanding therefrom surrounding one of said suspension members upstanding upon one surface of said disk having parts disposed to provide a plurality' of spaced barriers upon said surface in a.

radial direction from said conductor attach-' 111g part, in combination with means at the periphery of the disk forming a moisture conducting path about the periphery'of the disk, said means comprising in part an annular flange upstanding upon the mentioned surface of said disk arranged to protect said ridge.

In testimony whereof I afiix my signature in the presence of two witnesses.

LOUIS STEINBERGER. \Vitnesses':

L. GUsFoRn HANDIE, NATHALIE THOMPSON.

copies of this patent may be obtained for live cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

